From Shades of Deep Purple (1968) by Deep Purple

Prelude: Happiness I'm So Glad (Blackmore/Evans/Lord/Simper) - 7:19

I'm so glad
I'm so glad
I'm glad, I'm glad, I'm glad
I'm so glad
I'm so glad
I'm glad, I'm glad, I'm glad

Don't know what to do
Don't know what to do
Don't know what I'm gonna do
Another weekend
Telephone you
Tried of groaning for you

I'm so glad
I'm so glad
I'm glad, I'm glad, I'm glad
I'm so glad
I'm so glad
I'm glad, I'm glad, I'm glad